1 | Description | White crystalline powder. | White crystalline powder. |
2 | Solubility | Passes | Soluble in water; insoluble in alcohol.Practically insoluble in ethanol (95%) |
3 | Assay (acidimetric) | 99.6% | 99.5% - 100.5% |
4 | Identification (Sodium) | Passes | A dense precipitate should form. |
5 | Identification (Bicarbonate 1) | Passes | Effervesce with acids, evolves a colorless gas that when pass into calcium hydroxide solution produces white precipitate immediately |
6 | Identification (Bicarbonate 2) | Passes | A cold solution should be only slightly colored by phenolphthalein solution |
7 | Identification (By chemical test 1) | Passes | A pale pink color should produce. On heating gas should evolve and the solution become red |
8 | Identification (By chemical test 2) | Passes | white precipitate should form which dissolves on addition of an excess of hydrochloric acid |
9 | Appearance of solution | Passes | Clear and colorless solution |
10 | Insoluble matter | Passes | The solution should be complete and clear |
11 | pH (5% aq soln) | 8.09 | 7.9 – 8.4 |
12 | Carbonate (as CO3) | Passes | The solution does not assume more than a faint pink color immediately |
13 | Chloride (Cl) | Less than 0.015% | NMT 0.015% |
14 | Sulfate (SO4) | Less than 0.01% | NMT 0.01% |
15 | Sulfur compound (as S) | Less than 0.015% | NMT 0.015% |
16 | Heavy metals (as Pb) | Less than 0.0005% | NMT 0.0005% |
17 | Arsenic (As) | Less than 0.0001% | NMT 0.0001% |
18 | Calcium (Ca) | Less than 0.01% | NMT 0.01% |
19 | Iron (Fe) | Less than 0.002% | NMT 0.002% |
20 | Ammonium(NH4) | Less than 0.002% | NMT 0.002% |
21 | Loss on drying | 0.20% | NMT 0.25% |
22 | Total aerobic microbial count | Less than 100CFU/gm | NMT 100CFU/gm |
23 | Total Yeast and mold count | Less than 100CFU/gm | NMT 100CFU/gm |
24 | Bacterial endotoxins | Less than 2.5IU/gm | NMT 2.5IU/g |